Apparatus for recording and/or reproducing a component video signal having a luminance signal of a wide frequency band and a chroma signal in a band below the high end of the luminance signal band and within the latter

Claim 2

In an apparatus for recording a component video signal having a luminance signal of a relatively wide frequency band so as to reproducible for obtaining a picture of high resolution and a chroma signal in a chroma band included within said frequency band of the luminance signal and being substantially below the high end thereof, a signal processing circuit comprising: means receiving said luminance signal for separating therefrom a slant direction luminance signal formed of slant direction luminance information in a frequency band that includes and extends substantially above said chroma band; means for suppressing said luminance signal by said slant direction luminance signal so as to obtain a suppressed luminance signal; frequency-converting means for frequency-converting a component of said slant direction luminance signal in said chroma band to a frequency-converted slant direction luminance signal which is frequency interleaved with said suppressed luminance signal and which is in a frequency band higher than said chroma band; means for frequency interleaving said chroma signal with said suppressed luminance signal; and means for adding said suppressed luminance signal, said frequency-converted slant direction luminance signal and said chroma signal interleaved with the suppressed luminance signal so as to provide an added signal to be recorded.

Claim 3

In an apparatus for recording a component video signal having a luminance signal of a relatively wide frequency band so as to be reproducible for obtaining a picture of high resolution and a chroma signal in a chroma band included within said frequency band of the luminance signal and being substantially below the high end thereof, a signal processing circuit comprising: means receiving said luminance signal for separating therefrom a slant direction luminance signal formed of slant direction luminance information in a frequency band that includes and extends substantially above said chroma band, said means for separating including high-pass filter means for passing said frequency band of said luminance signal that includes, and extends above said chroma band, and comb-type filter means acting on the output of said high-pass filter means; means for suppressing said luminance signal by said slant direction luminance signal so as to obtain a suppressed luminance signal; frequency-converting means for frequency-converting a component of said slant direction luminance signal in said chroma band to a frequency-converted slant direction luminance signal which is frequency interleaved with said suppressed luminance signal and which is in a frequency band higher than said chroma band; means for frequency interleaving said chroma signal with said suppressed luminance signal; and means for adding said suppressed luminance signal, said frequency-converted slant direction luminance signal and said chroma signal interleaved with the suppressed luminance signal so as to provide an added signal to be recorded.

Claim 4

In an apparatus for recording a component video signal having a luminance signal of a relatively wide frequency band so as to be reproducible for obtaining a picture of high resolution and a chroma signal in a chroma band included within said frequency band of the luminance signal and being substantially below the high end thereof, a signal processing circuit comprising: means receiving said luminance signal for separating therefrom a slant direction luminance signal formed of slant direction luminance information in a frequency band that includes and extends substantially above said chroma band, said means for separating including high-pass filter means for passing said frequency band of said luminance signal that includes, and extends above said chroma band, and comb-type filter means acting on the output of said high-pass filter means; means for suppressing said luminance signal by said slant direction luminance signal so as to obtain a suppressed luminance signal; frequency-converting means for frequency-converting a component of said slant direction luminance signal in said chroma band to a frequency-converted slant direction luminance signal which is frequency interleaved with said suppressed luminance signal and which is in a frequency band higher than said chroma band; means for frequency interleaving said chroma signal with said suppressed luminance signal; and means for adding said suppressed luminance signal, said frequency-converted slant direction luminance signal and said chroma signal interleaved with the suppressed luminance signal so as to provide an added signal to be recorded.

Claim 5

An apparatus according to claim 2; in which said means for suppressing said luminance signal includes subtracting means for subtracting an output of said comb-type filter means from said luminance signal of the component video signal.

Claim 6

An apparatus according to claim 3; in which said means for frequency interleaving said chroma signal with said suppressed luminance signal includes second comb-type filter means having a frequency characteristic substantially the same as a frequency characteristic of the first mentioned comb-type filter means.

Claim 7

An apparatus according to claim 4; in which each of said first and second comb-type filter means suppresses the level of the respective signal at frequencies that are spaced apart by a horizontal frequency of the component video signal.

Claim 8

An apparatus according to claim 3; in which said frequency-converting means includes low-pass filter means having a cut-off frequency corresponding substantially to the upper end of said chroma band so as to provide, as an output from said lowpass filter means, a frequency band of said slant direction luminance signal corresponding to said chroma band, and means multiplying said output from the low-pass filter means by a predetermined frequency for obtaining said frequency-converted slant direction luminance signal which is frequency interleaved with said suppressed luminance signal.

Claim 9

In an apparatus for reproducing a recorded video signal that includes a chroma signal in a chroma band, a suppressed luminance signal frequency interleaved with said chroma signal and in which a luminance signal is suppressed by a slant direction luminance signal in a frequency band that includes and extends substantially above said chroma band, and a frequency-converted slant direction luminance signal frequency-interleaved with respect to the suppressed luminance signal and which is constituted by a component of said slant direction luminance signal in said chroma band frequency-converted to a band higher than said chroma band, a circuit for processing said recorded video signal when reproduced, comprising: separating means receiving the reproduced video signal for separating therefrom said chroma signal, said frequencyconverted slant direction luminance signal and said suppressed luminance signal; frequency-converting means for reconverting the separated frequency-converted slant direction luminance signal to said chroma band and in frequency interleaved relation to said suppressed luminance signal; and adding means for adding the reconverted slant direction luminance signal and the separated suppressed luminance signal so as to provide therefrom a luminance signal whose slant direction luminance information is dropped-out only in a frequency band above said chroma band and which forms, with the separated chroma signal, a component video signal.

Claim 10

In an apparatus for reproducing a recorded video signal that includes a chroma signal in a chroma band, a suppressed luminance signal frequency interleaved with said chroma signal and in which a luminance signal is suppressed by a slant direction luminance signal in a frequency band that includes and extends substantially above said chroma band, and a frequency-converted slant direction luminance signal frequency-interleaved with respect to the suppressed luminance signal and which is constituted by a component of said slant direction luminance signal in said chroma band frequency-converted to a band higher than said chroma band, a circuit for processing said recorded video signal when reproduced, comprising: separating means receiving the reproduced video signal for separating therefrom said chroma signal, said frequencyconverted slant direction luminance signal and said suppressed luminance signal; frequency-converting means for reconverting the separated frequency-converted slant direction luminance signal to said chroma band and in frequency interleaved relation to said suppressed luminance signal; and adding means for adding the reconverted slant direction luminance signal and the separated suppressed luminance signal so as to provide therefrom a luminance signal whose slant direction luminance information is dropped-out only in a frequency band above said chroma band and which forms, with the separated chroma signal, a component video signal.

Claim 11

In an apparatus for reproducing a recorded video signal that includes a chroma band, a suppressed luminance signal frequency interleaved with said chroma signal and in which a luminance signal is suppressed by a slant direction luminance signal in a frequency band that includes and extends substantially above said chroma band, and a frequency-converted slant direction luminance signal frequency-interleaved with respect to the suppressed luminance signal and which is constituted by a component of said slant direction luminance signal in said chroma band frequency-converted to a band higher than said chroma band, a circuit for processing said recorded video signal when reproduced, comprising: separating means receiving the reproduced video signal for separating therefrom said chroma signal, said frequency-converted slant direction luminance signal and said suppressed luminance signal, said separating means including high-pass filter means having a cut-off frequency substantially corresponding to the lower end of said chroma band, comb-type filter means receiving an output of said high-pass filter means for deriving therefrom said chroma signal and said frequencyconverted slant direction luminance signal, low-pass filter means receiving an output of said comb-type filter means and having a cut-off frequency substantially corresponding to the upper end of said chroma band for passing said chroma signal, and subtracting means for subtracting said output of the comb-type filter means from said reproduced video signal so as to provide said separated suppressed luminance signal; frequency-converting means for reconverting the separated frequency-converted slant direction luminance signal to said chroma band and in frequency interleaved relation to said suppressed luminance signal; and adding means for adding the reconverted slant direction luminance signal and the separated suppressed luminance signal so as to provide therefrom a luminance signal whose slant direction luminance information is dropped-out only in a frequency band above said chroma band and which forms, with the separated chroma signal, a component video signal.

Claim 12

In an apparatus for reproducing a recorded video signal that includes a chroma band, a suppressed luminance signal frequency interleaved with said chroma signal and in which a luminance signal is suppressed by a slant direction luminance signal in a frequency band that includes and extends substantially above said chroma band, and a frequency-converted slant direction luminance signal frequency-interleaved with respect to the suppressed luminance signal and which is constituted by a component of said slant direction luminance signal in said chroma band frequency-converted to a band higher than said chroma band, a circuit for processing said recorded video signal when reproduced, comprising: separating means receiving the reproduced video signal for separating therefrom said chroma signal, said frequency-converted slant direction luminance signal and said suppressed luminance signal, said separating means including high-pass filter means having a cut-off frequency substantially corresponding to the lower end of said chroma band, comb-type filter means receiving an output of said high-pass filter means for deriving therefrom said chroma signal and said frequencyconverted slant direction luminance signal, low-pass filter means receiving an output of said comb-type filter means and having a cut-off frequency substantially corresponding to the upper end of said chroma band for passing said chroma signal, and subtracting means for subtracting said output of the comb-type filter means from said reproduced video signal so as to provide said separated suppressed luminance signal; frequency-converting means for reconverting the separated frequency-converted slant direction luminance signal to said chroma band and in frequency interleaved relation to said suppressed luminance signal; and adding means for adding the reconverted slant direction luminance signal and the separated suppressed luminance signal so as to provide therefrom a luminance signal whose slant direction luminance information is dropped-out only in a frequency band above said chroma band and which forms, with the separated chroma signal, a component video signal.

Claim 13

An apparatus according to claim 8; in which said frequency-converting means includes second high-pass filter means having a cut-off frequency approximately corresponding to the lower end of the frequency band of said separated frqeuencyconverted slant direction luminance signal, and means multiplying an output from said second high-pass filter means by a predetermined frequency for obtaining the separated frequencyconverted slant direction luminance signal reconverted to said chroma band.

Claim 14

In an apparatus for recording and/or reproducing a component video signal having a luminance signal of a relatively wide frequency band so as to be reproducible for obtaining a picture of high resolution and a chroma signal in a chroma band included within said frequency band of the luminance signal and being substantially below the high end thereof: the combination of a recording signal processing circuit comprising first separating means receiving said luminance signal for separating therefrom a slant direction luminance signal formed of slant direction luminance information in a frequency band that includes and extends substantially above said chroma band; means for suppressing said luminance signal by said slant direction luminance signal so as to obtain a suppressed luminance signal; first frequency-converting means for frequency-converting a component of said slant direction luminance signal in said chroma band to a frequency-converted slant direction luminance signal which is frequency interleaved with said suppressed luminance signal and which is in a frequency band higher than said chroma band; means for frequency interleaving said chroma signal with said suppressed luminance signal; and means for adding said suppressed luminance signal, said frequency-converted slant direction luminance signal and said chroma signal interleaved with the suppressed luminance signal so as to provide a video signal to be recorded; and a circuit for processing the recorded video signal when reproduced, comprising second separating means receiving the reproduced video signal for separating therefrom said chroma signal, said frequency-converted slant direction luminance signal and said suppressed luminance signal; second frequency-converting means for reconverting the separated frequency-converted slant direction luminance signal to said chroma band and in frequency interleaved relation to said suppressed luminance signal; and means for adding the reconverted slant direction luminance signal and the separated suppressed luminance signal so as to provide therefrom a luminance signal whose slant direction luminance information is dropped-out only in a frequency band above said chroma band and which forms, with the separated chroma signal, a reproduced component video signal.

Claim 15

In an apparatus for recording and/or reproducing a component video signal having a luminance signal of a relatively wide frequency band so as to be reproducible for obtaining a picture of high resolution and a chroma signal in a chroma band included within said frequency band of the luminance signal and being substantially below the high end thereof: the combination of a recording signal processing circuit comprising first separating means receiving said luminance signal for separating therefrom a slant direction luminance signal formed of slant direction luminance information in a frequency band that includes and extends substantially above said chroma band; means for suppressing said luminance signal by said slant direction luminance signal so as to obtain a suppressed luminance signal; first frequency-converting means for frequency-converting a component of said slant direction luminance signal in said chroma band to a frequency-converted slant direction luminance signal which is frequency interleaved with said suppressed luminance signal and which is in a frequency band higher than said chroma band; means for frequency interleaving said chroma signal with said suppressed luminance signal; and means for adding said suppressed luminance signal, said frequency-converted slant direction luminance signal and said chroma signal interleaved with the suppressed luminance signal so as to provide a video signal to be recorded; and a circuit for processing the recorded video signal when reproduced, comprising second separating means receiving the reproduced video signal for separating therefrom said chroma signal, said frequency-converted slant direction luminance signal and said suppressed luminance signal; second frequency-converting means for reconverting the separated frequency-converted slant direction luminance signal to said chroma band and in frequency interleaved relation to said suppressed luminance signal; and means for adding the reconverted slant direction luminance signal and the separated suppressed luminance signal so as to provide therefrom a luminance signal whose slant direction luminance information is dropped-out only in a frequency band above said chroma band and which forms, with the separated chroma signal, a reproduced component video signal.

Claim 16

In an apparatus for recording and/or reproducing a component video signal having a luminance signal of a relatively wide frequency band so as to be reproducible for obtaining a picture of high resolution and a chorma signal in a chroma band included within said frequency band of the luminance signal and being substantially below the high end thereof; the combination of a recording signal processing circuit comprising first separating means receiving said luminance signal for separating therefrom a slant direction luminance signal formed of slant direction luminance information in a frequency band that includes and extends substantially above said chroma band, said first separating means including high-pass filter means for passing said frequency band of said luminance signal that includes, and extends above said chroma band, and comb-type filter means acting on the output of said high-pass filter means; means for suppressing said luminance signal by said slant direction luminance signal so as to obtain a suppressed luminance signal; first frequency-converting means for frequency-converting a component of said slant direction luminance signal in said chroma band to a frequency-converted slant direction luminance signal which is frequency interleaved with said suppressed luminance signal and which is in a frequency band higher than said chroma band; means for frequency interleaving said chroma signal with said suppressed luminance signal; and means for adding said suppressed luminance signal, said frequency-converted slant direction luminance signal and said chroma signal interleaved with the suppressed luminance signal so as to provide a video signal to be recorded; and a circuit for processing the recorded video signal when reproduced, comprising second separating means receiving the reproduced video signal for separating therefrom said chroma signal, said frequency-converted slant direction luminance signal and said suppressed luminance signal; second frequency-converting means for reconverting the separated frequency-converted slant direction luminance signal to said chroma band and in frequency interleaved relation to said suppressed luminance signal; and means for adding the reconverted slant direction luminance signal and the separated suppressed luminance signal so as to provide therefrom a luminance signal whose slant direction luminance information is dropped-out only in a frequency band above said chroma band and which forms, with the separated chroma signal, a reproduced component video signal.

Claim 17

In an apparatus for recording and/or reproducing a component video signal having a luminance signal of a relatively wide frequency band so as to be reproducible for obtaining a picture of high resolution and a chorma signal in a chroma band included within said frequency band of the luminance signal and being substantially below the high end thereof; the combination of a recording signal processing circuit comprising first separating means receiving said luminance signal for separating therefrom a slant direction luminance signal formed of slant direction luminance information in a frequency band that includes and extends substantially above said chroma band, said first separating means including high-pass filter means for passing said frequency band of said luminance signal that includes, and extends above said chroma band, and comb-type filter means acting on the output of said high-pass filter means; means for suppressing said luminance signal by said slant direction luminance signal so as to obtain a suppressed luminance signal; first frequency-converting means for frequency-converting a component of said slant direction luminance signal in said chroma band to a frequency-converted slant direction luminance signal which is frequency interleaved with said suppressed luminance signal and which is in a frequency band higher than said chroma band; means for frequency interleaving said chroma signal with said suppressed luminance signal; and means for adding said suppressed luminance signal, said frequency-converted slant direction luminance signal and said chroma signal interleaved with the suppressed luminance signal so as to provide a video signal to be recorded; and a circuit for processing the recorded video signal when reproduced, comprising second separating means receiving the reproduced video signal for separating therefrom said chroma signal, said frequency-converted slant direction luminance signal and said suppressed luminance signal; second frequency-converting means for reconverting the separated frequency-converted slant direction luminance signal to said chroma band and in frequency interleaved relation to said suppressed luminance signal; and means for adding the reconverted slant direction luminance signal and the separated suppressed luminance signal so as to provide therefrom a luminance signal whose slant direction luminance information is dropped-out only in a frequency band above said chroma band and which forms, with the separated chroma signal, a reproduced component video signal.

Claim 18

An apparatus according to claim 11; in which said means for suppressing said luminance signal includes subtracting means for subtracting an output of said comb-type filter means from said luminance signal of the input component video signal.

Claim 19

An apparatus according to claim 12; in which said means for frequency interleaving said chroma signal with said suppressed luminance signal includes second comb-type filter means having a frequency characteristic substantially the same as a frequency characteristic of the first mentioned comb-type filter means.

Claim 20

An apparatus according to claim 13; in which each of said first and second comb-type filter means suppresses the level of the respective signal at frequencies that are spaced apart by a horizontal frequency of the component video signal.

Claim 21

An apparatus according to claim 12; in which said first frequency-converting means includes low-pass filter means having a cut-off frequency corresponding substantially to the upper end of said chroma band so as to provide, as an output from said low-pass filter means, a frequency band of said slant direction luminance signal corresponding to said chroma band, and means multiplying said output from the low-pass filter means by a predetermined frequency for obtaining said frequency-converted slant direction luminance signal which is frequency interleaved with said suppressed luminance signal.

Claim 22

In an apparatus for recording and/or reproducing a component video signal having a luminance signal of a relatively wide frequency band so as to be reproducible for obtaining a picture of high resolution and a chroma signal in a chroma band included within said frequency band of the luminance signal and being substantially below the high end thereof; the combination of a recording signal processing circuit comprising first separating means receiving said luminance signal for separating therefrom a slant direction luminance signal formed of slant direction luminance information in a frequency band that includes and extends substantially above said chroma band; means for suppressing said luminance signal by said slant direction luminance signal so as to be obtain a suppressed luminance signal; first frequency-converting means for frequency-converting a component of said slant direction luminance signal in said chroma band to a frequency-converted slant direction luminance signal which is frequency interleaved with said suppressed luminance signal and which is in a frequency band higher than said chroma band; means for frequency interleaving said chroma signal with said suppressed luminance signal; and means for adding said suppressed luminance signal, said frequency-converted slant direction luminance signal and said chroma signal interleaved with the suppressed luminance signal so as to provide a video signal to be recorded; and a circuit for processing the recorded video signal when reproduced, comprising second separating means receiving the reproduced video signal for separating therefrom said chroma signal, said frequency-converted slant direction luminance signal and said suppressed luminance signal, said second separating means including high-pass filter means having a cutoff frequency substantially corresponding to the lower end of said chroma band, comb-type filter means receiving an output of said high-pass filter means for deriving therefrom said chroma signal and said frequency-converted slant direction luminance signal, low-pass filter means receiving an output of said combtype filter means and having a cut-off frequency substantially corresponding to the upper end of said chroma band for passing said chroma signal, and subtracting means for subtracting said output of the comb-type filter means from said reproduced video signal so as to provide said separated suppressed luminance signal; second frequency-converting means for reconverting the separated frequency-converted slant direction luminance signal to said chroma band and in frequency interleaved relation to said suppressed luminance signal; and means for adding the reconverted slant direction luminance signal and the separated suppressed luminance signal so as to provide therefrom a luminance signal whose slant direction luminance information is dropped-out only in a frequency band above said chroma band and which forms, with the separated chroma signal, a reproduced component video signal.

Claim 23

In an apparatus for recording and/or reproducing a component video signal having a luminance signal of a relatively wide frequency band so as to be reproducible for obtaining a picture of high resolution and a chroma signal in a chroma band included within said frequency band of the luminance signal and being substantially below the high end thereof; the combination of a recording signal processing circuit comprising first separating means receiving said luminance signal for separating therefrom a slant direction luminance signal formed of slant direction luminance information in a frequency band that includes and extends substantially above said chroma band; means for suppressing said luminance signal by said slant direction luminance signal so as to be obtain a suppressed luminance signal; first frequency-converting means for frequency-converting a component of said slant direction luminance signal in said chroma band to a frequency-converted slant direction luminance signal which is frequency interleaved with said suppressed luminance signal and which is in a frequency band higher than said chroma band; means for frequency interleaving said chroma signal with said suppressed luminance signal; and means for adding said suppressed luminance signal, said frequency-converted slant direction luminance signal and said chroma signal interleaved with the suppressed luminance signal so as to provide a video signal to be recorded; and a circuit for processing the recorded video signal when reproduced, comprising second separating means receiving the reproduced video signal for separating therefrom said chroma signal, said frequency-converted slant direction luminance signal and said suppressed luminance signal, said second separating means including high-pass filter means having a cutoff frequency substantially corresponding to the lower end of said chroma band, comb-type filter means receiving an output of said high-pass filter means for deriving therefrom said chroma signal and said frequency-converted slant direction luminance signal, low-pass filter means receiving an output of said combtype filter means and having a cut-off frequency substantially corresponding to the upper end of said chroma band for passing said chroma signal, and subtracting means for subtracting said output of the comb-type filter means from said reproduced video signal so as to provide said separated suppressed luminance signal; second frequency-converting means for reconverting the separated frequency-converted slant direction luminance signal to said chroma band and in frequency interleaved relation to said suppressed luminance signal; and means for adding the reconverted slant direction luminance signal and the separated suppressed luminance signal so as to provide therefrom a luminance signal whose slant direction luminance information is dropped-out only in a frequency band above said chroma band and which forms, with the separated chroma signal, a reproduced component video signal.

Claim 24

An apparatus according to claim 16; in which said second frequency-converting means includes second high-pass filter means having a cut-off frequency approximately corresponding to the lower end of the frequency band of said separated frequency-converted slant direction luminance signal, and means multiplying an output from said second high-pass filter means by a predetermined frequency for obtaining the separated frequency-converted slant direction luminance signal reconverted to said chroma band.